P0864 Diagnostic Trouble Code

P0864 is a kind of OBD-II Diagnostic P-Powertrain Diagnostic Trouble Code.

It is considered generic because it applies to all makes and models of vehicles, although specific repair steps may be different depending on your car model.

Symptoms

Symptoms of a P0864 diagnostic trouble code may include:

Hesitation upon acceleration
Excessive exhaust leak
Rich or lean exhaust
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

An air leak forward of the DPF will change the sensor readings resulting in the code
Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
Some aftermarket accessories and performance modifications

Repair Processes :

Now, clear the codes and test-drive the vehicle to see if the code is reset. With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed.

Process Tips

Diagnostic trouble code P0864 is not difficult to diagnose and repair. Thus, it always pays to have a qualified technician to look after your vehicle should this error code arise.

Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine. If other codes that relates to misfiring condition, lean running or air entering the engine is present, then you must first fix those error codes before P0864.

Fortunately, P0864 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P0864 Trouble Code For Specific Cars

P0864 Chrysler 1610 Engine Oil Pressure Sensor/Switch High Voltage
P0864 Nissan 300 Chime OUTPUT Request Ckt Short to Ground
P0864 Heuliez Pregunta Passenger's Seat Occupied Switch Circuit Short to Ground
P0864 Audi 60 Alternator Load Input Failed
P0864 Gmc Suburban Park Brake Switch # 2 Applied Circuit Failure
P0864 Scion Tc Injection Pump Fuel Metering Control "B" Range/Performance (Cam/Rotor/Injector)
P0864 Fairthorpe Mk Injector Circuit Malfunction - Cylinder 5